If anyone is interested in a retrofit for their mercedes, email me at sunil@mwhouston.com I plan to come there in about 2-3 weeks. I can do any OEM retrofit for mercedes. Some of the retrofits are

Folding Power Mirrors
Heated seats
Heated Rears (certain cars)
Trunk closers (certain models)
Navigation
Sirius Satellite Radio
Ipod Kits
Lowering Modules (renntech) or Star Diagnose
Convex Mirrors
Stationary Heaters
Rear view cameras (certain models)
Distronic
Parktronic
Phone Systems
Voice Control
Rear Power shade
Interior Motion Sensor
Xenon Headlamps

More info at http://web.mac.com/motorwerks